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<article class="li"><h3 class="heading">
<span class="type">Item</span><span class="space"> </span><span class="codenumber">2</span><span class="period">.</span>
</h3>
<p>If</p>
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\begin{equation*}
y(x)=Ax+B,\quad\to\quad y'(x)=A
\end{equation*}
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<p class="continuation">By boundary conditions, we have <span class="process-math">\(A=0,~B\in\mathbb{R}\text{.}\)</span> So we found an eigenpair:</p>
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\begin{equation*}
{\lambda_0=0,\qquad y_0(x)=1}.
\end{equation*}
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